Kwan et al. (64) genotyped tagging and candidate SNPs of SCN1A, 2A, and 3A in 471 Chinese patients with epilepsy and reported a significant correlation between an intronic SNP in SCN2A (IVS7-32A>G, rs2304016) and responsiveness to various ASDs, but the polymorphism did not significantly alter SCN2A mRNA levels in resected brain tissue or peripheral white blood cells. This evidence concerns the gene SCN2A and epilepsy.